Town of Ledgeview, WI
Brown County
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Table of Contents
Table of Contents
[HISTORY: Adopted by the Town Board of the Town of Ledgeview 10-20-2009 by Ord. No. 2009-034. Amendments noted where applicable.]
GENERAL REFERENCES
Building construction — See Ch. 15.
Construction site erosion control — See Ch. 36.
Stormwater management — See Ch. 90.
Weapons and firearms — See Ch. 129.
Zoning — See Ch. 135.
The purpose of this chapter is to regulate the use of explosive materials and to establish uniform limits on permissible levels of blasting resultants to reasonably assure that blasting resultants do not cause injury, damage or a nuisance to persons or property.
The following definitions shall apply in this chapter. Terms not herein defined shall be understood to have their usual and ordinary dictionary meaning.
AIRBLAST
An airborne shock wave resulting from the detonation of explosives.
APPROVED
Approval granted by the Town of Ledgeview.
BLASTER
Any individual holding a valid blaster's license issued by the Wisconsin Department of Commerce.
BLASTING
Any method of loosening, moving or shattering masses of solid matter by use of an explosive.
BLASTING BUSINESS
Any individual, corporation, company, association, firm, partnership, society, or joint-stock company engaged in a blasting operation.
BLASTING OPERATION
Any operation, enterprise or activity involving the use of blasting.
BLASTING RESULTANTS
The physical manifestations of forces released by blasting, including, but not limited to, projectile matter, vibration and concussion, which might cause injury, damage or unreasonable annoyance to persons or property located outside the controlled blasting site area.
COMMUNITY
A built-up inhabited area.
CONTROLLED BLASTING SITE AREA
The area that surrounds a blasting site and:
A. 
Is owned by the operator; or
B. 
With respect to which, because of property ownership, employment relationship or agreement with the property owner, the operator can take reasonably adequate measures to exclude or to assure the safety of persons and property.
DEPARTMENT
The Wisconsin Department of Commerce.
DETONATOR
Any device containing a detonating charge that is used for initiating detonation in an explosive. The term includes, but is not limited to, electric blasting caps of instantaneous and delay types initiated by an electric current; blasting caps for use with safety fuses; detonating cord delay connectors; and nonelectric instantaneous and delay blasting caps.
EXPLOSION
The substantially instantaneous release of both gas and heat.
EXPLOSIVE
Any chemical compound, mixture or device the primary or common purpose of which is to function by explosion unless the compound, mixture or device is otherwise classified by the Department by rule.
EXPLOSIVE MATERIALS
Explosives, blasting agents and detonators. The term includes, but is not limited to, dynamite and other high explosives, slurries, emulsions, water gels, blasting agents, black powder, pellet powder, initiating explosives, detonators, safety fuses, squibs, detonating cord, igniter cord and igniters.
FLYROCK
Rock that is propelled through the air from a blast.
GROUND VIBRATION
A shaking of the ground caused by the elastic wave emanating from a blast.
HIGHWAY
Any public street, public alley, public road or recorded right-of-way easement.
INHABITED BUILDING
A building designed for, or regularly occupied in whole or in part as, a habitation for human beings, including any church, schoolhouse, railroad station, store or other structure where people are accustomed to assemble, except any building or structure occupied in connection with the manufacture, transportation, storage or use of explosive materials for the blasting activity.
NUISANCE
An excessive, repeated noise, dust, vibration or other disturbance that would cause an unreasonable annoyance.
PARTICLE VELOCITY
Any measure of ground vibration describing the velocity at which a particle of ground vibrates when excited by a seismic wave.
PERSON
Any individual, corporation, company, association, firm, partnership, society or joint-stock company.
POWDER FACTOR
Any ratio between the amount of powder loaded and the amount of rock broken.
PRIMER
A capped fuse, electric detonator or any other detonating device inserted in or attached to a cartridge of detonator sensitive explosive.
STEMMING
The inert material, such as drill cutting, used in the collar portion or elsewhere of a blast hole to confine the gaseous products of detonation.
A. 
General.
(1) 
No person shall handle or use explosive materials in the Town of Ledgeview unless he:
(a) 
Possesses a valid State of Wisconsin blaster's license with the proper classification or is supervised by a holder of a valid State of Wisconsin blaster's license with the proper classification; and
(b) 
Possesses all necessary state and local permits and complies with all applicable local, state and federal regulations, including, but not limited to, the requirements of this chapter and Ch. Comm 7, Explosives and Fireworks, Wis. Adm. Code.
(2) 
Blast holes may only be drilled and blasted to the first geographical shelf. No blasting shall be done within 200 feet of the outer boundaries of the Niagara Escarpment.
B. 
Application. Applications for an explosives use permit shall be in writing upon forms provided by the Town Clerk. Applications shall be accompanied by a permit fee as set forth in § 1-16 of the Town of Ledgeview Code of Ordinances. Permits shall be issued on an annual basis commencing January 1 and ending on December 31. All explosives use permits applied for after January 1 shall be prorated from the date of the issuance of the permit through the end of the year. Applications may be made by and permits issued to the blasting business, provided that the person doing the blasting or responsible for such blasting shall hold a valid Wisconsin blaster's license with proper classification. The applicant will identify the licensed blasters operating under the permit and the blasting locations within the Town of Ledgeview. All applications for reissuance and renewal for an explosives use permit shall be filed by the permittee with the Town Clerk of the Town of Ledgeview within 60 days before the expiration date of the previous permit, together with a permit fee as set forth in § 1-16 of the Town of Ledgview Code of Ordinances. Each nonadjacent parcel shall require a separate application and permit fee. For the purpose of this chapter, properties shall be considered nonadjacent if they have a separate parcel identification number and are not contiguous. Parcels separated by a public road are also deemed to be nonadjacent.
C. 
Certificate of insurance. Each application for an explosives use permit as herein stated, or a renewal thereof, shall be accompanied by a certificate of insurance for a commercial general liability policy, and said policy of insurance shall have limits of coverage of not less than $4,000,000 in the aggregate and $1,000,000 per occurrence.
[Amended 8-16-2011 by Ord. No. 2011-010]
D. 
Explosives use plan. Each application for an explosives use permit or a renewal thereof shall include a written description of the total area within which explosives are proposed to be used, blasting procedures to be employed, including types of explosives, initiating systems, and an aerial photograph or drawing acceptable to the Town Board with a scale of no less than one inch equals 100 feet and which accurately includes all areas and inhabited buildings within 1,000 feet of all property lines of the property upon which blasting is to occur.
E. 
Blasting notification. Before any blasting operation may be conducted within the Town of Ledgeview, the blaster shall give notice thereof by the conspicuous display of a fluorescent flag and legible sign giving notice of the blasting operation. The flag and sign shall be displayed at least one hour prior to and during all blasting operations. In addition, verbal or written notice of the blasting operation shall be given to the Town Clerk of the Town of Ledgeview at least 24 hours prior to commencement of blasting operations.
F. 
Hours of operation. Blasting shall only be conducted between 8:00 a.m. and 4:00 p.m. on Monday through Friday; provided, however, that in the event an emergency has delayed a blast beyond 4:00 p.m., loaded holes may be blasted within one hour thereafter. Blasting shall not be conducted at other times or on Saturdays and Sundays or legal holidays without written permission from the Town Board, which shall only be granted upon a showing of extreme need.
G. 
Blasting log. An accurate blasting log shall be prepared and maintained for each blast fired, and a true and complete copy of said log shall be supplied to the Town Clerk within three working days of a request for a copy of said log. The Town may require that the permittee furnish to the Town an analysis of any particular blasting log to be prepared by the permittee. In the event the permittee cannot or will not prepare a reliable analysis, the Town may obtain such analysis from an independent expert at the permittee's cost. The permittee shall also be liable for the reasonable cost of any independent analysis if it is determined after an opportunity to be heard that this chapter was violated by the permittee. Each blasting log shall include, but not be restricted to, the following information:
(1) 
Name, signature and license number of blaster in charge of blast;
(2) 
Blast location references, including address, bench and station number if applicable. Information may be supplied may include an aerial photograph or drawing of the explosives use area;
(3) 
Date and time of blast;
(4) 
Weather conditions at time of blast;
(5) 
Diagram and cross section of blast hole layout;
(6) 
Number of blast holes;
(7) 
Blast hole depth and diameter;
(8) 
Spacing and burden of blast holes;
(9) 
Maximum holes per delay;
(10) 
Maximum pounds of explosives per delay;
(11) 
Number, depth, length and type of stemming used between decks;
(12) 
Total pounds of explosives used, including primers and initiating cord;
(13) 
Distance to nearest inhabited building not owned by permittee;
(14) 
Type of initiation system used;
(15) 
Seismographic and airblast information, which shall include:
(a) 
Type of instrument and last calibration date;
(b) 
Exact location of instrument and date, time and distance from the blast;
(c) 
Name and company affiliation of person taking reading;
(d) 
Name of the person and firm analyzing the seismographic and airblast data when required;
(e) 
Vibrations and airblast levels recorded;
(f) 
Trigger levels for ground and air vibrations;
(g) 
Copy of the seismograph printout.
A. 
Purpose. It is the purpose of this section to provide for uniform limits on permissible levels of blasting resultants to reasonably assure that blasting within the Town of Ledgeview does not cause injury, damage or unreasonable annoyance to persons or property outside the controlled blasting site area.
B. 
Instrumentation. All blast-monitoring instruments used to produce data to support compliance with this subsection shall meet the following minimum specifications:
(1) 
Seismic frequency range: 2 Hz to 200 Hz (± 3Hz).
(2) 
Acoustic frequency range: 2 Hz to 200 Hz (± 1Hz).
(3) 
Velocity range: 0.02 inch to 4.0 inches per second.
(4) 
Sound range: 110 dB to 140dB linear.
(5) 
Transducers: three mutually perpendicular axes.
(6) 
Recording: provide time-history of waveform.
(7) 
Printout: direct printout showing time, date, peak air pressure, peak particle velocity and frequency in three directions and a printed waveform graph of the event depicting measured airblast and particle velocity in the three directions.
(8) 
Calibration: be laboratory calibrated as often as necessary, but at least once every 12 months according to manufacturer's recommendations.
C. 
Control of adverse effects.
(1) 
General requirements. Blasting shall be conducted so as to prevent injury or an unreasonable annoyance to persons and damage to public or private property outside the controlled blasting site area.
(2) 
Airblast.
(a) 
Airblast shall not exceed 133 peak dB at the location of all accessory structures, dwellings, public building, place of employment, school, church or community or institutional building outside and beyond the controlled blasting site area.
(b) 
The blaster shall conduct monitoring of every blast to determine compliance with the airblast limit. The measuring system used shall have a lower-end flat frequency response of not more than 2 Hz and an upper-end flat frequency response of at least 200 Hz.
D. 
Ground vibration: general.
(1) 
The maximum ground vibration at the location of any dwelling, public building, place of employment, school, church, or community or institutional building outside the controlled blasting site area shall be established in accordance with either the maximum peak-particle-velocity limit (see Table 130-4.1), the scaled-distance equation of Subsection G, or the blasting-level chart of Subsection H.
(2) 
All structures in the vicinity of the controlled blasting site area not listed in Subsection D(1), such as water towers, pipelines and other utilities, tunnels, dams, impoundments, foundations, anchoring monuments and underground mines, shall be protected from damage by establishment by the operator of a maximum allowable limit on the ground vibration. The operator shall establish the limit after consulting with the owner of the structure.
(3) 
Maximum peak particle velocity. An operator may use the maximum ground vibration limits listed in Table 130-4.1.
Table 130-4.1
Peak Particle Velocity Limits
Type of Structure
Maximum in Allowable Peak Particle Velocity for Ground Vibration (inches per second)
At Frequencies Below 40 Hz*
At Frequencies 40 Hz and Greater
Modern homes and structures with drywall interiors
0.75
2.0
Older homes and structures with plaster on wood lath construction for interior walls
0.50
2.0
*All spectral peaks within 6 dB (50%) amplitude of the predominant frequency must be analyzed.
E. 
Ground vibration shall be measured as the particle velocity. Particle velocity shall be recorded in three mutually perpendicular directions. The maximum allowable peak particle velocity shall apply to each of the three measurements and the vector sum of the three measurements.
F. 
A seismographic record shall be provided for each blast.
G. 
Scaled-distance equation.
(1) 
An operator may use the scaled-distance equation, W = (D/DS)2, to determine the allowable charge-weight of explosives to be detonated in any eight-millisecond period, without seismic monitoring, where W = the maximum weight per delay of explosives, in pounds; D = the distance, in feet, from the blasting site to the nearest structure listed in Subsection D(1) and (2); and DS = the scaled-distance factor listed in Table 130-4.2.
(2) 
The development of a modified scaled-distance factor may be authorized by the Town on receipt of a written request by the operator, supported by seismographic records of blasting at the site. The modified scaled-distance factor shall be determined such that the particle velocity of the predicted ground vibration will not exceed the prescribed maximum allowable peak particle velocity of Subsection D(3) at a ninety-five-percent confidence level.
Table 130-4.2
Scaled-Distance Factor Limits
Distance (D) From the Blasting
Scaled-Distance Factor (DS) To Be Applied Without Seismic Monitoring
0 to 300
50
301 to 5,000
55
5,001 and beyond
65
H. 
Blasting level chart.
(1) 
An operator may use the ground vibration limits found in Figure 7.44 of § Comm 7.44(4), Wis. Adm. Code, to determine the maximum allowable ground vibration.
(2) 
If the Figure 7.44 limits are used, a seismographic record including both particle-velocity and vibration frequency levels shall be provided for each blast. The method of analysis shall be subject to reasonable discretionary review by the Town.
A. 
Monitoring.
(1) 
The permittee shall monitor all blasts at the closest location to the blast of any dwelling, public building, place of employment, school, church or community or institutional building outside and beyond the permittee explosives use area; provided, however, that the permittee, may monitor at another location, approximately the same distance from the blast site, if the permittee is unable to obtain permission to conduct the monitoring from the owner of the preferred location. The Town Board or its designee may, at its discretion, require the relocation of monitoring equipment to a more suitable site.
(2) 
All measuring equipment during monitoring shall be spiked to the ground or sandbagged.
B. 
Flyrock. Flyrock produced as a result of explosives use shall be totally contained within the controlled blasting site area.
C. 
Seismic monitoring. The Town Board, in its discretion, may conduct independent seismic blast monitoring or air blast monitoring to spot-check data supplied by the permit holder. If the independent monitoring discloses after hearing that the chapter was violated by the permittee, then, in that event, the permittee shall pay the reasonable costs incurred by the Town for the independent monitoring.
D. 
For nonmetallic mining there shall be no blasting within 100 feet of any property lines.
A. 
Preblasting notification. Each explosives use permit application and all reapplications shall include the names and addresses of all residents or owners of dwellings or other structures located within 1,000 feet of the boundaries of the blasting site, as described in the explosives use plan.
B. 
At the time of permit application, the applicant shall have notified, in writing, all residents or owners of dwellings or other structures located within the previously defined area (1,000 feet) that they may request a preblast survey and a water quality test for existing wells. Requests in response shall be in writing. Upon request, the applicant shall cause a preblast survey to be conducted as to such dwelling or structures, and water quality testing for existing wells; provided, however, that the applicant shall not be required to conduct a preblast survey or well water quality testing more than once every six years as to any dwelling, structure, or well.
C. 
The owner of a dwelling or structure that is within 1,000 feet of the blasting site, which, subsequent to the conducting of a preblast survey has been substantially modified or improved by more than 50% of the property's fair market value, may request a preblast survey. If it is found that a preblast survey for such improved or modified structure is appropriate, the applicant/permittee may conduct such surveys within a reasonable period of time, but in no case exceeding twice a year for all such requests by all owners.
D. 
The preblast survey and water quality testing shall be promptly conducted in a manner and form and by an independent survey company, a laboratory approved by the State of Wisconsin or organization selected by the applicant and acceptable to the owner or resident and the Town Zoning Administrator. The survey shall determine the condition of the dwelling or structure and shall document any preblasting damage or other physical factors that could reasonably be expected to be affected by the use of explosives. The testing of wells shall determine the condition of the water as to be safe for human use. The Board may consider accepting a blasting survey or well water test that was prepared prior to the effective date of this chapter if the blasting survey and well water test meets the requirements outlined herein.
E. 
Each survey performed shall include a written report signed by the person who conducted the survey. Copies of the survey report(s) shall be promptly provided to the Town of Ledgeview, the owner or resident, and the applicant/permittee. The owner, resident or applicant/permittee shall promptly submit in writing to the Town of Ledgeview any objections to the survey report, setting forth in detail such objections.
F. 
Reasonable and reasonably related expenses incurred as a result of such independent surveys shall be the responsibility of the applicant/permittee.
A. 
Enforcement. The following are criteria that the Town Board may consider for issuance, reissuance, suspension or revocation of a blasting permit:
(1) 
Compliance with the blasting standards established by the Town of Ledgeview as noted herein by this chapter.
(2) 
Development and submittal to the Town Board of the Town of Ledgeview of the explosives use plan and compliance with the explosives use plan.
(3) 
Development and submittal to the Town Board of the Town of Ledgeview of the blasting log, when requested, and compliance with the operation plan with the information called for by the blasting log.
(4) 
Maintaining the insurance required by this chapter.
(5) 
Compliance with the operational hours for blasting as noted herein by this chapter.
(6) 
Compliance with airblast and ground vibration standards established by the Town of Ledgeview as noted herein by this chapter.
(7) 
Compliance with the preblasting notification requirements to residents and the Town Board as noted herein by this chapter.
(8) 
Attempts made by the permittee interest to comply with the provisions of this chapter.
(9) 
Consideration of atmospheric, unknown conditions, including geophysical conditions, and other matters beyond the control of the permittee.
B. 
Suspension/revocation.
(1) 
Unless expressly provided herein or by other Town of Ledgeview ordinance provisions, the explosive use permit may be suspended or revoked for cause for substantial noncompliance with the ordinance after the proper Town of Ledgeview hearing noted below, unless in an emergency condition determined by the Town Board of the Town of Ledgeview wherein the license, registration or permit can be suspended temporarily for a set time period. Prior to any action for suspension or revocation, the Town Board of the Town of Ledgeview must, by the Town Clerk of the Town of Ledgeview, receive a verified complaint concerning the licensee, registrant or permittee. The following persons may file a verified complaint with the Town Board of the Town of Ledgeview:
(a) 
The Town Chair.
(b) 
The Town Clerk.
(c) 
The Town Supervisors.
(d) 
The Town Zoning Administrator/Building Inspector.
(e) 
The Town Constable.
(f) 
A landowner within 1,000 feet of the blasting site.
(2) 
The Town Board will make a determination if the allegations of the complaint are of sufficient magnitude, importance, or otherwise of such a nature as to require a formal evidentiary hearing.
(3) 
The person subject to charges for violation of any Town of Ledgeview ordinance or any violation of condition of the explosives use permit shall be provided a copy of the verified complaint and notice of hearing before the Town Board of the Town of Ledgeview. The hearing shall be required to be not less than 10 days nor more than 30 days after receipt of notice, unless stipulated in writing by the Town Board of the Town of Ledgeview and the person subject to charges.
(4) 
The person subject to charges for violation of any Town of Ledgeview ordinance or any violation of a condition of the explosives use permit shall be entitled to the following:
(a) 
Representation by legal counsel.
(b) 
Right to present and cross-examine witnesses.
(c) 
Right to subpoena witnesses by the Town Chair of the Town of Ledgeview issuing subpoenas to compel attendance of witnesses.
(5) 
The Town Board of the Town of Ledgeview may, after the hearing for any person previously issued an explosives use permit by the Town Board of the Town of Ledgeview, act as follows:
(a) 
Revoke the permit as a final decision.
(b) 
Suspend the permit for a date certain as a final decision.
(c) 
Request additional information as an interim decision prior to taking future action.
(d) 
Take no action on the permit as a final decision.
(6) 
The final decision of the Town Board of the Town of Ledgeview to revoke or suspend the blasting permit shall be subject to appeal to the Circuit Court, which appeal must be fled with the Circuit Court not later than 45 days from the mailing of the Town Board's decision to the permit holder.
C. 
Penalty.
(1) 
In addition to the denial, suspension or revocation of a permit issued under this chapter, any person who shall violate any provision of this chapter or who shall fail to obtain a permit as required hereunder shall, upon conviction of such violation, be subject to a penalty of a civil forfeiture of not less than $5 nor more than $500, together with the costs of prosecution. Any default of such forfeiture determined by a court of competent jurisdiction shall be subject to any penalties as provided by §§ 66.0109, 66.0113, 66.0114 and 66.0115, Wis. Stats., as may be amended.
(2) 
Each violation and each day a violation continues or occurs shall constitute a separate offense. Nothing in this chapter shall preclude the Town from maintaining any appropriate action to prevent or remove a violation of any provision of this chapter.